A Jewish monument has been defaced with offensive grafitti and hate slogans by a group of neo-Nazis.

The extremists, from the pro-Hitler hate group National Action, also draped a swastika flag over the memorial in Cannon Hill park, Birmingham.

Police are now investigating after the vandals posted a video of their actions on YouTube.

It was uploaded from an account linked to National Action, a fascist youth group said to have previously been under investigation by anti-terrorism cops.

The video shows figures spray-painting a Jewish Star of David onto the park gates, with the caption “bankers” and ''1%" before they climb a menorah, a seven-branched candle stand used in Jewish worship.

Extremists: The neo-Nazi group target the Jewish shrine in Cannon Hill Park in Birmingham

The large menorah, maintained by the Lubavitch Jewish community, has been a popular attraction in the park for years and is lit during Jewish festivals.

Maggie Suissa, campaigns director for the Union of Jewish Students, urged police to find those responsible.

She said: “It’s disgusting but dishearteningly this isn’t surprising.

"Jewish people need reassurance, genuine security and the promise from counter terrorism that this group will not continue to get away with spreading their Nazi hatred.”

'Disgusting': Campaigns director Maggie Suissa said Jewish people need assurance from counter terrorism that they are safe

National Action has reportedly been viewed by Scotland Yard as a potential threat to National Security. Its ‘official strategy’ documents feature photos of a smiling Adolf Hitler and masked activists performing Nazi salutes.

The group has previously described itself as “the fascists your nan warned you about.”

The camps were run by a fascist fanatic who boasted of building a “new SS” and who was planning to show recruits training videos from the Islamic State.

After the January attacks on French satirical magazine Charlie Hebdo by Jihadist extremists, National Action released a photoshopped image of murdered chief editor Stephane Charbonnier with the caption “like and share if you think this f***** got what he deserved”.

Grafitti: The hate group sprayed their logos throughout the park

National Action posters are said to have been found at a dozen UK universities and one alleged leader quit Warwick University after being named in a national newspaper.

The group demonstrated at Nelson Mandela’s statue in London last year and also draped a banner with the slogan, “Anti-Racist is a Codeword for Anti-White” over a bridge in Birmingham.

Inspector Rachel Crump, of West Midlands Police, said: “We are aware of a video on YouTube which appears to show religiously aggravated vandalism in Cannon Hill Park.

“We take reports of hate crime extremely seriously and would urge anyone with information which would help us identify the people in the images to contact police on 101 or the independent charity Crimestoppers anonymously on 0800 555 111.”

Fascists: Cannon Hill Park is the latest site to be targeted by the National Action extremist group (Image: BPM)